Folding try-square.



No. 805,050. I PATBNTED Nov. 21, 1005.

. J. H. DANIBLS.

FoLDING TRY SQUARE.

APPLICATION FILED FEB. 25, 1905.

. I n tbovwug UNITED STATES PATENT clarion FOLDING TRY-SQUARE.

Specification of Letters Patent.

Patented Nov. 21, 1905.

Application led February 25, 1905. Serial No. 247,331.

To all whom, it' may concern:

Be it known that I, JOHN HENRY DANInLs, a citizen of the United States,residing at St. Louis, State of Missouri,have invented new and usefulImprovements in Folding Try- Squares, of which the following is aspeciiication.

This invention relates to folding trysquares.

i The objects of the invention are to improve and simplify theconstruction of such devices furthermore to increase their efficiencyin' operation and to decrease the eX pense attending their manufacture.

With the foregoing and other objects in view, which will appear as thedescription proceeds, the invention resides in the novel combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed as apractical embodiment thereof.

In the accompanying drawings, forming a part of this specication, Figure1 is a plan view of a try-square constructed in accordance with theinvention. Fig. 2 is a view looking toward the front edge of the stock.Fig. 3 is a longitudinal section through one end of the stock.

Like reference-numerals indicate corresponding parts in the differentviews.

The reference numeral 1 indicates the stock, and 2 the-blade. Thesemembers may be constructed of any suitable material and size. The stock1 is provided in its rear edge with Ya leveling-tube 3, a secondleveling-tube 4 being arranged at a right angle with respect to the tube3. Formed in the front edge 5 of the stock 1 is a longitudinal slot 6,having a rearward extension 7 terminating at the rear edge of the stockadjacent to one end thereof, as shown in Fig. 1. The stock 1 is formedon one side of the slot 6 with a recess 8, which preferably is circularinform and is beveled at its outer end, as shown by 9. Leading out ofthe recess 8 is a channel 10, which terminates in a perforation 11, -eX-tending through the Ystock into the slot 6, as shown in Fig. 3.Pivotally mounted in the channel 10, as shown at 12, is a lockingmember. 13, having a pin 14 extending through the perforation 11. At itsrear end the locking member 13 is formed with a circular iinger portion15, which is located in the Vbeveled recess 8. Mounted in the recess 8,below the locking member 13, is a spring 16, the free end of which bearsagainst the under side of the circular finger portion 15 of the lockingmember 13. The stock 1 preferably is provided on its front edge,adjacent to the slot 6, with scale-marks, as clearly shown in Fig. 2.

The blade 2 is pivotally mounted within the slot 6 adjacent to therearward extension 7 thereof. At one end the blade 2 is formed with aprojection 17, which is adapted when the blade is arranged Yat a rightangle with respect to the stock to fit partially into the rearwardextension 7 of the slot 6, as shown in Fig. l, said projection 17 beingarranged to fit but partially into the rearward eXtension 7, so that theentire edge 1S of the blade 2 may be exposed from one end to the otherto facilitate measuring operations. As shown in Fig. 1, both edges 1Sand 1Q of the stock 2 are provided with suitable scale-marks of anydesired kind. The blade 2 is also provided with a longitudinal series ofperforations 20, each of Which is formed with pointed ends and acircular central portion, as shown in Fig. 1. Adjacent to thepivot-point 21 of the blade 2 a series of perforations 22 is formed inthe blade 2, said perforations being placed on the segment of a circlehaving the pivot-point 21 as its center. The perfolrations 22 aredesigned to receive the pin 14 of the locking member 13, so as to lockthe blade 2 at any desired angle with respect to the stock 1 or to holdthe same in alinement therewith when the blade is folded into the slot6.

From the foregoing description it will b e apparent to those skilled inthe art to which this invention relates that the improved instrument isparticularly adapted for use as a try-square, gage, bevel-square, plumband level, miter-square, rule, and straight-edge.

Changes in the precise embodiment of invention illustrated and describedmay be made within the scope of the following claims without departingfrom the spirit of the invention or sacrificing any of its advantages.

Having thus described the invention, what is claimed as new is 1. Atry-square comprising a stock having a circular recess formed with abeveled outer end anda channel leading out of said recess, a lockingmember pivoted in said channel and having a circular finger portiondisposed in said recess, a spring in said channel bearing at its freeend against the under side of said finger portion, and a blade pivotallyconnected With said stock and adapted to be IOO IIO

held in adjusted position by said locking member.

2. A try-'square comprising a stock having a slot in its front edge,said slot at one end of the stock having a rearward extension terlminating at the rear edge of the stock, said stock being formed with acircular recess having a beveled outer end, and a channel leading out ofsaid recess and terminating in a perforation extending through to theslot, a locking member pivoted in said channel and having a pinextending through the perforation, said locking member having a circularlinger portion located in said recess, a spring in said channel bearingat its free end

